Piston for internal-combustion motors



April 8 1924.

E. C. LONG 9 PISTON FOR INTERNAL COMBUSTION MOTORS Filed Dec. 9, 1918 Patented Apr. 8, 1924.

UNITED STATES PATENT OFFICE.

ELMER 0. LONG, OF QUINCY, ILLINOIS.

PISTON FOR INTERNAL-COMBUSTION MOTORS.

Application filed December 9, 1918.

To all whom it may concern:

Be it known that I, ELMER C. LoNc, a citizen of the United States of America, and a resident of the city of Quincy, in the county of Adams and State of Illinois, have invented certain new and useful Improvements in Pistons for Internal-Combustion Motors, of which the following is a specification.

The primary object of this invention is to provide an improved piston for internal combustion motors, whereby a better working relation is established between the piston and its cylinder during the operation of the motor under highly heated conditions.

Another object is to provide an improvement in a piston, whereby the working thrust due to the piston forcing the connecting rod is received by only one part of the piston surface, and not on the whole piston as heretofore'.

Other and further objects will appear in the specification and be specifically pointed out in the appended claims, reference being had to the accompanying drawings exemplifying the invention, and in which,

Figure 1 is a side elevation of this improved piston.

Figure 2 is a side elevation opposite to that shown in Fig. 1.

Figure 3 1s a side elevation taken in the direction of the arrow 3 in Fig. 1.

Figure 4 is a vertical section taken on the line IVIV of Fig. 1.

Figure 5 is a transverse section taken on the line VV of Fig. 4.

Referring to the drawings 1 designates a solid head of the piston, 2 the main body portion, and 3 the wrist pin bearings.

ormed on one side of the main body portion 2, as shown more clearly in Fig. 1, is a cut out portion 4 which is formed in the periphery of the piston by the pair of longitudinal slots 5 and transverse slot 6, which adjoins the slots 5 adjacent the solid end 1 of the piston, said slots at their opposite ends 'continuing to the lower end 7 of the piston. The cut out ortion 4 is held in its peripheral position y a pair of integrally formed connecting portions 8, each of said portions extending from each of the wrist pin bear- 7 ings 3.

Formed in the piston periphery opposite to the cut out portion 4 1s a tongue shaped portion 8, having its free end extend adjacent the solid end 1 of the piston, said tongue portion being separated from the body por- Serial No. 265,946.

tion 2 of the piston by a pair of longitudinal slots 9 and a transverse slot 10, said slots 9 at their lower ends terminating at a distance from the end 7 of the piston.

From the aforesaid detailed construction ofthis improved piston, the body portion 2 thereof having the cut away portion 4 and tongue shaped portion 8 formed therein, will be resilient, as against the ordinary type of piston, and inasmuch as the exploding inipulses of internal combustion motors are effective on the solid heads of the pistons, a higher temperature will be given to the solid piston end or head, as against the body portion of the piston on which is contained the cylinder engaging portion.

In this connection, with applieants improved construction, since the body portion 2 or cylinder engaging portionhas separated portions, independent contracting and expanding extents can be carried out in the piston between the body portion 2 and the solid head 1 of the piston.

Inasmuch as the cut out portions provide resilienc to the body portion 2 of the piston, in or er to take care of the greatest amount of expansion of the solid head of the piston, the periphery of the piston adjacent the solid head is made smaller in diameter than the remaining portion of the piston, as designated at 11, as the piston rings when mounted in the recesses 12 will provide the cylinder fit for the solid head 1, whereas the cut out portion 4 and tongue shaped portion 8 of the body portion 2 of the piston will yieldingly bear against the cylinder wall.

In addition to the aforesaid, in the opera tion of thi improved piston, when the piston is driving the connecting rod downwardly on the line 13, and in the direction of the arrow 14 in Fig. 4, the forcin thrust of the piston on the connecting ro is received by the connecting portions 8 and borne by the cut away portion 4 against the cylinder wall, thereby relieving the remaining portions of the piston from the thrust, and hence forth preventing bending strains being carried to the tongue shaped portion 8, and consequently preventing back slap of the piston.

What I claim is:

1. A one piece piston having a portion entirely separated and unsupported from its peripheral face, between the wrist pin bearings thereof, the peripheral wall of said piston which is oppositely disposed from said separated portion being slotted.

2. A piston having a portion separated and unsupported from its peripheral face, and a cut out tongue shaped portion formed in the periphery of said piston oppositely disposed from said separated portion.

3. A piston having a portion separated and unsupported from its peripheral face, means for supporting said separated portion from the interior of the piston, and a cut out tongue shaped portion formed in the periphery of said piston oppositely disposed from said separated portion.

at. A one piece full skirted hollow piston having a portion of its peripheral face entirely cut away, between the wrist pin bearings thereof thereby forming a separated peripheral portion, and supporting means secured to said separated portion and the wrist-pin bearings of the piston, for holding said separated portion in peripheral alinement with the peripheral face of the piston.

5. A piston having a solid end portion and a full skirt portion formed integral therewith, and there being a part of said skirt portion entirely cut away and wholly unsupported from the main body portion thereof.

6. A piston havin a solid end portion and a skirt portion ormed integral therewith, there being a part of said skirt portion entirely cut away and Wholly unsupported from the main body portion thereof, and there being a tongue shaped portion formed in said skirt portion.

7. A hollow piston having a portion of its peripheral wall entirely cut away between the wrist pin bearings thereof, thereby forming a separated section, said. peripheral wall bearing a slot in opposite disposition to said section and supportingmeans secured to said section and the wrist pin bearings of the piston for holding said section in alinement with the peripheral wall.

8. A full skirted one piece piston having a portion of its peripheral wall entirely cut away and wholly separated from the remaining portion of the peripheral wall, said cut away portion being integrally supported from the interior of the piston.

9. A one piece piston having a pair of slots cut entirely through the thickness of its peripheral wall, said slots leading from the open end of the piston to a point adjacent the lowermost packing ring recess thereof and being joined by a transversely extending slot thereby forming a disconnected portion, and integral means provided for supporting said disconnected portion between said slots.

ELMER C. LONG. 

